Interactions in populations.
D000917:Antibody Formation; D003585:Cell Biology; D004739:England; D004804:Eosinophils; D007111:Immunity, Cellular; D007365:Intercellular Junctions; D008214:Lymphocytes / Q000276:immunology; D008264:Macrophages / Q000276:immunology; D008407:Mast Cells; D008544:Melanocytes